www/chromium: update to 79.0.3945.130 [1] and restore path for policies [2].

Submitted by: Matthias Wolf [1], Landon Fuller [2] via Github
MFH: 2020Q1 (security, browser)
Security: https://chromereleases.googleblog.com/2020/01/stable-channel-update-for-desktop_16.html